Thursday, December 10, 2009

Size and Type of Heat Exchanger





Heat exchangers basics, the knowledge of heat exchanger and its importance in industry should be known
Do you have any idea, how to size heat exchanger and its type designated ?
First we will  consider sizing part; what do you mean by sizing designations? How to designate shell diameter, shell thickness , heat exchanger length, tubes dimensions, baffle size etc. Theoretical explanation is as fallows:


  1. TEMA standards (Tubular Exchanger Manufacturing Association) and Heat Exchanger Institute (HEI) standards have specified the nomenclature for the size and type of shell and tube heat exchanger.
  2. Size is designated by the nominal shell diameter and the tube length.
  3. The tube length for a straight tube unit is the distance between the outermost tube faces. For a U-tube unit, it is the distance between the outermost face of the tubesheet  and the bend tangent.
Type of heat exchanger is designated by a set of letters associated with the front end, the shell and rear end as in figure.
  1. Split-ring floating head (S) exchanger with removable channel and cover (A), single-pass shell (E), 23.5 inch (590 mm) inside diameter with tubes 16 ft (4880 mm) long. Size 23-192 (590-4880), Type AES
  2. U-tube exchanger (U) with bonnet-type stationary head (B), split flow shell (G), 19 in (480 mm) inside diameter with tubes 7 ft ( 2130) straight length. Size 19-84 (480-2130), Type BGU
  3. Fixed tubesheet exchanger with removable channel and cover (A), bonnet-type rear head (M), two-pass shell (F), 33 1/8 inch (840 mm) inside diameter with tubes 8 ft (2440 mm) long. Size 33-96 (840-2440), Type AFM
[TO SEE FIGURE CLEARLY CLICK ON IT]





By Rajendra

5 comments:

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